Islamic equivalent of kosher (5)
I believe the answer is:
'islamic equivalent of kosher' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for halal that I've seen before include "Describing meat butchered according to Islamic law" , "slaughter" , "specially-prepared meat" , "(Meat) from animals slaughtered according to Muslim law" , "Meat prepared for Muslims" .)